<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Test</title>
</head>
<body>
    <ul id="list">
        <li>1</li>
        <li>2</li>
        <li>3fbandesk</li>
    </ul>
    <div>卧槽</div>
</body>
<script>
    var e = document.querySelector('#list')
    e.addEventListener('click', function(event){
        console.log(event.target)
    })
</script>
</html>